Electric protective device.



W. DEUTSCHER.

ELECTRIC PROTECTIVE DEVICE. APPLICATION FILED nIzc.2o. I'9I2.

Patented July 9, 1918.

WLM/wonen UNITED sTATEs PATENT oEEicE.

WILLIAM DEUTSCHER, OF NEW YORK, N'. Y.

ELECTRIC PROTECTIVE DEVICE.

To all 'whom t may concern.

Be it known that I, WILLIAM DEUTSCHER,

a subject of the Emperor of Germany, anda resident of the borough ofManhattan, city, county, and State of New York, have 1nvented= a new and useful Improvement in Electric Protective Devices, of which the following is a specification.

My invention relates to electric protective devices of that type designed to give an electrically controlled warning signal when tempted to be operated by one unfamiliar therewith. In other words, the signal will be operated either by a mere opening of the door, the signal device bein unobserved, or,

by an attempt to actuate t e signal device by one unfamiliar therewith eifen though the door be closed. I accomplishedthese objects by embodying in my signal system what may be termed a selective control.

In the following I have described, in connection with the accompanying drawings, one means ofcarrying out the principles of my invention, the features thereof being more particularly pointed out hereinafter in the claims.

In the drawings Figure 1 is a Vertical sectional view along the line 1-1 of Fig. 2, on an enlarged scale, of one illustrative form of device embodying my invention, parts being shown in diagrammatic form, Fig. 2 is a front view of the device, full slze, as it will appear embedded in or adjacent to a door and Fig. 3 is atop View of a detail showing the connections and control at the hin e ofthe door.

irnilar numerals of reference indicate similar parts throughoutthe several views.

In the drawings, 8 indicates a casing made of any suitable non-conducting material, circular in shape and provided with a iange 9 by means of which, in connection with screws extending therethrough, the device may be aiiixed t'o the door or wall adjacent thereto.

10 is a plate closing the back of the casing' and fastened to the casing in any suitable .Specication `of Letters Patent. Patented J uly 9, 1918,

Application tiled December 20, 1912. Serial N o. 737,809.

manner '(not show'n). The depth of the casing and the proportions of the parts should preferably besuch that the selective devices may be set or withdrawn and reset from the back of the device, z. e. from inside the door or w'all.

11 and 12 lindicate rings of electrically conducting material separated by a nonconducting flange 13, preferably a part of the casing 8, to which fiange 13 the rings aref .fastened in any `convenient manner (not shown)t 14 is a disk o fpreferably 4noncond'uctmg material carrying as a part thereof and attached thereto a conducting ring- 15. Disk 14 and its 'ring 15 dare free to have' motion toward' and away from rin 12.

Disk 14 carries slotted-bosses or s eeves 16, 17 and 18 preferably of non-conducting ma'- `terial on which sleeves a disk 19, preferably of non-conducting material, slidably mounted, disk 19 carrying 'a conducting ring 20.r 21 is a stationary ring of conductj ing material., Disk 19is free to have motion toward and away fromring 21. Spring 25 keeps ring 15 normally in contact with ring 12 and spring-26 keeps ring 20 normally in contact with ring 21. 27'1is a disk of preferably non-conducting materialloosely mounted `on ,the pins which are fastened to vthe push-buttons hereinafter described land carrying a 'conducting ring 28. Disk 27 is free to have motion toward and away from ring 11. Spring 29 surrounding boss 30 on disk 27 and bearing against disks 14 and 27 tends to keep ring 28 normally out of contact with ring 11. Push-buttons 2, 1 and 5 mounted in the front wall of casingfS carry vpins 31, 32 and 33 respectively. The push buttons bear loosely a ainst the outer face of disk 27, while the pms project through disk 27 but are free therefrom as shown. Both the push-buttons and pins are of non-conducting material. Each of the sleeves 16, 17

and 18 are provided with slots 34 and keyways 35 opening thereinto for the purpose hereinafter described. v36 and 37 are pins of non-conducting material mounted in sleeves 17 and y18'respectively, .pin 36 carrying a finger 38 adapted to bear against disk 14 and p1n 37 carr ing afinger 39 adapted to bear against j isk 19. Pins 36 41 respectively, adapted to bear a ainst the outside of late 10. Pins 36 and 3 oluble in s eeves 17 and 18 so that fingers and 37 are also provided with stps 40 and 38 and 39 may be brought into registry with slots 34 therein and locked by turning the fingers outv through the slots. Pins 36 and 37 may be withdrawn from the device by reversing the operation described. The pins may then be reinserted in sleeve 16 or any of the others which may be provided, the stops limiting the inward movement of the pins by contacting with the plate 10. Pins 36/and 37 are also shown as being of less diameter than the openings in disk 27 through which pins 31, 32 and 33 project; y 40 is a battery or other source of power having one pole connected in parallel-with contact ring.`- 2 and the conducting 'ring 20 on disk 19,

switch 44, and the other pole connected in parallel respectively to contact ring 11 and bracket 45. adjacent to or mounted on the door. 46 is an electromagnetically controlled bell in series with contacts 47, 48 and 49 and contact 50 on bracket 45 but insulated therefrom. Contact 47 is in electrical connection with the conducting ring 28 on disk 27 through a suitable flexible conduc- 'i 46 and located at a point distant from bell 46. 52 is a bell crank of conducting material pivoted in bracket and adapted to close the circuit between bracket 45 and contact when turned on its pivot by spring 53 on door 54, theopening of the door causing spring 53 to turn bell crank 52 to make contact and the closing of the door to break Contact. Leaf springs 55 are provided to take inl beliind stops 40 and 41 to retain pins 36 and 37 in inoperative position after they. have been depressed. They may be readily released when the device is to be reset. Springs 55 may of course be omitted, in which case the fingers of the operator must hold the pins in depressed position while opening the door.

In Fig. 2 I have shown seven push-buttons numbered from 1 to 7 inclusive. Of course there may be 'any number of pushbuttons more than one, preferably at least one of said push-buttons having no coperating pin, similar to pin 36 or 37, adjacent the inner end thereof, and there may be any number of pins 36, 37 but at least one. If only one such pin 36 or 37 is used the disk 19 and its associated parts may be omitted. In the drawing the gaps between the pins 32 and 36 and between the pins 33 and 37 are, shown as being of different widths due to the difference in lengths of the pins 36 and 37. This is not necessary, however, provided that the gap between the pins 36,

37 and the pins 31, 32 and 33 is in each ine common wire 43 to saidv branches in parallel being provided with a 51 is an electromag- 'stance less than the distance between rings .ring 12 and the conducting ring 15 on disk 14 .to be broken. He then depressespushbutton 5, forcing pin 37 inward and breaking contact between ring 21 and the conducting ring 20 on disk 19. Although by the depressing of the push-buttons disk 27 may have been moved to cause its conductingring 28 to contact with' contact ring 11, no current will flow, as there is no path for the current through the battery. The order in which the push buttons are operated is not material, the essential thing being that each one of the pins 36, 37 should be protracted from its normal position so that each of the-return circuits to the battery will be y broken before the door is opened, regardless of the order in which these operations are performed. v

Now if one unfamiliarA with the combination opens the door without-actuating any of the push-buttons, a path will be established fronrone pole of the battery through bracket 45, contact 50, bell 46, bell 51,'ring 15 on ,disk 14 and ring 12 to battery and through contact ring 21 and ring 20 to battery, switch 44 being closed, and the bells will sound.

If push-button` 2 is depressed, ring 28 on and ring 28 is in parallel with that through bracket 45 and' contact 50, the bells will sound also with the door open.

If'only push-button 1 is depressed, ring 28 is caused to contact with ring 11 as before,

the path through ring 15 on disk 14 is.

broken but that through ring 20 on disk 19 is not broken. Hence the ath for the eurrent is established and the ells sound.

If only push-button 5 is depressed, ring 28 is caused to'contact with ring 11 as before, the path through ring` 2() on disk 19 is broken but that through ring 15 on disk 14 is not broken. Hence the path for the current is established and the bells sound.

It is obvious that the pins 36 and 37 may be withdrawn and reinserted ,to make any desired predetermined combination or that there may be as many pins 36, 37 as there are push-buttons, thus increasing the possible number of combinations. Of course if there are more than two pins 36, 37 there must be more coperating dlsks but I have found it to be sufficient to provide but two of such pins and disks, leaving the remainder of the push-buttons opposite blanks, thus increasing the difculty of one unfamiliar with the combination to hit upon the right one without actuating the bells. l

Bell 46 may be located in the room, apartment or house where the device is located and the other bell or bells in parallel there- ',with may be located in neighboring rooms,

apartments or houses, thus giving the signals at different points. If it 1s desired to cut the device out of service for any reason, switch 44 may be opened.

It is obvious that the bell crank 52may be counterweighted so that after spring 53 has tripped it. it will fall back into neutral position and break the contact so that the bell will stop ringing and the instrument may be reset and the door closed.

It is obvious that there may be many variations in arrangement and numbers of parts without departing from the broad idea of my invention and I do not limit myself to the details as shown and described, further than the scope of the appended claims demand.

What I claim and desire to secure by Letters Patent is:

1. In an electric protective device, a switch element comprising a casing of nonconducting material provided with a plu'- rality of openings .through-the face thereof, a spring controlled plate adjacent the inner face of said casing, push buttons mounted in said openings and bearing against said plate, a conducting piece carried by said plate and a second conducting piece in the path Iof said first conducting piece, said first and second conducting pieces being provided with means for connecting them with signal circuit terminals.

2, In an electric protective device, a switch element comprising a casing of non-conductingv material provided with a plurality of openingsthrough the face thereof, a spring controlled plate adjacent the inner face of said casing, pushv buttons mounted in said .openings and bearing against said plate,

pins carried by said ush buttons and projecting through sai plate, a conducting piece carried by said plate, a second conducting piece in the path of said rst con- 4from said Second conducting piece, said conducting pieces respectively being provided with means for connecting them with signal circuit terminals.

3. In an electric protective dev1ce, a switch element comprising a casing of non-conducting material provided with a plurality of.

openings through the face thereof, a sprin controlled plate adjacent the inner face o said casing, ush buttons mounted in said openings an -bearing against said plate, pins carried by said push buttons and projecting through said plate, a conducting piece carried by said plate, a second conducting piece in the path of said first conducting piece, a plurality of movable supports of non-conducting material arranged one behind the other, a pin carried by each said support and bearing against said support, veach pin in the path of a push button and its pin, a conducting piece carried by each said support and a conducting piece in the path of each of said movable conducting pieces but insulated from said second conducting piece, said conducting pieces respectively being provided with means for connecting them with signal circuit terminals. 4. In an electric protective device, a switch element comprising a casing of non-conducting material provided with a plurality of openings through the face thereof, a plurality ofspring-controlled movable plates of non-conducting 'material arranged one behind fthe other opposite said openings, push buttons seated in said openin s for moving said plates away from the ace of said casing, pins carried by said push buttons, conducting ieces carried by each of said plates and xed conductin pieces in the path of each of said movab e conducting pieces, said conducting pieces respectively being provided with means for connecting them with signal circuit terminals. In testimony whereof I have signed this specification in the presence of two subscribing witnesses. WILLIAM DEUTSCHER.. Witnesses: fi

SEABURYC. MAs'riCx,

K. G. LE ABD. 

